Abrading-machine.



110.890.5 12. PATENTED JUNE 9, 1908.

- A. V. WALKER.

ABRADING MACHINE. APPLIUATION rum) MAY 15. 1907.

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' mra No. 890,542. PATENTED JUNE 9, 1908.

A. v. WALKER.

ABRADING MACHINE.

APPLICATION FILED MAY 15, 1907.

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No. 890,542 'PATENTED JUNE 9, 1908. A. v. WALKER.

ABRADING MACHINE. APPLICATION FILED MAY 16, 1907.

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THE NORRIS FETERSCO As 1 01cm 0 c No. 890,542. PATENTED JUNE 9, 1908. A.V. WALKER. ABRADINGMAGHINE.

APPLICATION FILED MAY 15. 1907.

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ATTORNEYS WITNESSES ALPHA VIVIAN WALKER, OF LEOMINSTER, MASSACHUSETTS.

ABRADING-MAGHINE Specification of Letters Patent.

Patented June 9, 1908.

Application filed May 15, 1907. Serial No. 373,718.

To all whom it may concern:

Beit known that I, ALPHA VIVIAN WAL- KER, a citizen of the UnitedStates, and a resident of Leominster, in the county of Worcester andState of Massachusetts, have invented a new and ImprovedAbrading-Machine, of which the following is a full, clear, and exactdescription.

This invention relates to abrading machines and more particularly tothat class of abrading machines in which the abrasive material iscarried upon a moving flexible band or belt.

The object of the invention is to provide a simple, strong and eiiicientabrading machine by means of which curved surfaces of wood-work and thelike can be rendered smooth, or finished, rapidly and easily, and whichis adapted for the application of the abrasive to work presentingdifferent curved surfaces.

A further object of the invention is to provide a device of this classin which a traveling band or belt presents an abrasive surface shaped tocorrespond to the curve of the work by means of removable dies, and inwhich the work is held. upon a suitable carrier having three independentmotions.

A still further object of the invention is to provide an abradingmachine having an abrasive belt shaped to conform to the curve of thework by means of interchangeable removable dies.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and particularly set forth in theclaims.

Reference is to be had to the accompanying drawings forming a part ofthis specifica tion, in which similar characters of reference indicatecorresponding parts in all the views, and in which Figure 1 is a frontelevation of the machine; Fig. 2 is a plan view; Fig. 3 is an endelevation; Fig. 4 is a vertical cross section of the upper part of thedevice on the line 44 of Fig. 1; Fig. 5 is a front elevation of theupper part of the machine showing the same in operation Fig. 6 is alongitudinal section on the line 66 of Fig. 2; Fig. 7 is a verticalcross section on the line 77 of Fig. 5; Fig. 8 is a perspective view ofa detail showing a die-carrying arm; Fig. 9 is a perspective view of adetail showing an adjustable die; Fig. 10 is a perspective view of anattachment to the uprights 6.

adjustable die shown in Fig. 9; and Fig. 11 is a perspective view of afurther adjustable arm carrying a die.

Referring more particularly to the drawings, I provide a base 1, havingtransverse members 2 arranged in suitable recesses formed at the underside of the base and having extensions 3 projecting laterally at oneside of the base. The extensions 3 are joined by a longitudinal member4. At each end of the base is a supporting plate 5 carrying standardscomprising mutually inclined The uprights 6 are joined at their upperextremities by longitudinal frame-members 7 extending from support tosupport and rigidly mounted at the side edges of the upright 6. Afurther longitudinal frame member 8 is arranged upon the upper ends ofthe uprights and rests upon the upper edges of the members 7. Themembers 7 and 8 are secured to the uprights by means of screws orrivets, or in any other suitable manner. The uprights 6 are rigidlymounted upon the supporting plates 5 and have spacing blocks 9 arrangedbetween their lower extremities. At one end of the machine the members 7are provided with grooves. A slidable yoke 10 having laterally disposeddownwardly-extending flanges 11 presenting tongues 12 is slidablyarranged upon the transverse frame members near one end thereof, thetongues 12 engaging the grooves in the frame members 7. The yoke 10 hasset-screws 13 arranged in suitably threaded openings of the flanges 11by means of which it may be rigidly secured in position. The yoke memberhas at the upper side thereof under-cut grooves or recesses 14 in whichis slidably arranged a tongue 15 of a bearing bracket 16. A secondbearing bracket 18 is rigidly carried at the opposite end of the machineupon the longitudinal frame members and is secured in position by meansof bolts or rivets or in any other suitable manner. The bearing brackets16 and 18 have bearings 19 and 20 in which are revolubly arranged shafts21 and 22. The shafts 21 and 22 extend laterally beyond the bearings 19and 20 at one side of the machine and carry rigid pulleys 23 and 24. Theshafts are provided with suitable stop collars 25. The shaft 22 extendslaterally beyond the bearings at the opposite end and is provided withdriving pulleys 26 and 27 by means of which the machine may be operated.A

j and upwardly disposed flanges 33.

flexible band or belt 28 havingan abrasive surface, for instance emerycloth, is arranged upon the pulleys 23 and 24.

Adjacent to the supports of the machine frame and at the inner sidesthereof, are guide uprights 29. Transverse supporting members 30 havingsleeves 31 arranged to slide upon the guides 29 are mounted underneaththe longitudinal frame members and present guide grooves 32 formed bylaterally Slidably mounted at the guide grooves 32 are members 34 havingdownwardly-disposed flanges engaging at each side of the flange 33 ofthe members 30. The members 34 carry a rigid joining table 35. The table35 near the outer edge thereof has longitudinal guide grooves 36 inwhich are slidably. arranged tongues 37 of a work-carrier 38. At theforward edge the table 35 has a plurality of notches 39. A finger 40rigidly secured at the forward edge of the work-carrier engages one ofthe notches 39 to lock the carrier against movement in one direction.The finger 40 is mounted upon the carrier by means of a shank 41presenting an extension 42 by means of which the carrier may be manuallyadjusted. Near the upper extremities of the supports of the frame ateach side thereof, are brackets 43 having laterallyextending pulleys 44.Similar pulleys 45 are secured to the transverse sliding members 30 nearthe center thereof at each side. Flexible members 46, preferablyconsisting of chains are secured to the members 30 by means of eyelets47 carried by the latter and pass over the pulleys 44 and 45 dependingfrom the latter outside of the frame supports and carrying weights 48.It will be understood that the Weights normally force the transversetable-carrying members 30 up ward towardthe belts carried by the pulleys23 and 24.

As the table is slidable transversely of the frame upon the members 30and as the workcarrier is slidable at right angles to the movement ofthe table, longitudinally of the frame, the work can be adjusted inthree different directions: Upwards towards the pulley, transverse ofthe same, and longitudinally thereof. When the work is forced intoengagement with the abrasive belt the latter tends to carry the workwith it in the direction of movement of the run of the belt whichengages the work. To lock the work-carrier upon the table the notches 39and the finger 40 are provided, the lower run of the belt traveling inthe direction of the pulley 24 from the pulley 23. At the outerextremities of the extensions 3 are bearing brackets 49 at which arepivoted levers 50 by means of a bearing rod 51. The free ends of thelever 50 are joined by a bar 52 by means of which the levers may bedepressed by the foot of the operator of the machine; At the,

under side of the transverse members 30 is a longitudinal joining rod 53presenting eyelets 54. Links 55 are mounted at the eyes 54 and have theupper extremities secured to the levers 50, so that when the latter aredepressed by means of the bar 52 the transverse members and the workcarrier therewith are depressed, and the work is disengaged from theabrasive belt. l/Vhen the bar '52 is released the weights 48 return thework into operative engagement with the belt.

At the upper edge of the longitudinal frame members 7, adjacent to thepulleys 23 and 24, is arranged a frame member 56 presenting alongitudinal slot 57 and having upward extensions 58 provided withrecesses 59. The frame member 56 is secured in position by means ofscrews or rivets or in any other suitable manner. At the end, the member57 is secured to blocks 60 and 61 presenting grooves for the purpose,and resting upon the longitudinal frame member 8 and rigid therewith.The block 61 adjacent to the yoke 10 engages a lateral screw 62 arrangedin a suitably threaded opening of the bearing bracket 16 and havingahead 63 by means of which it may be operated. screw 62 is turned in onedirection, the bearing bracket 16 will be moved longitudinally of theframe, carrying the pulley 23 in a direction away from the pulley 24,thereby increasing the tension of the belt. If the As the screw 62 isturned in the opposite direction,

the tension of the belt will draw the pulley 23 towards the pulley 24,thereby causing the belt to become slack and decreasing the tension.Members 64 having lateral arms 65 and bodies 66 are located upon thelongitudinal frame member 8, the arm 65 extending between the upper andlower runs of the belt.- Bolts 67, passing through suitable openings inthe body 66, have threaded extremities arranged in the recesses 59 ofthe member 56 and are held in place by means of stop-washers 68 and nuts69. The members 64 are rigidly mounted upon the longitudinal framemembers. The arms 65 at the outer extremities have slots 7 O. A beam 71extends longitudinally of the frame and is carried at the outerextremities of the arms 65 by their lower extremities flattened andsecured by means of screws 77 in slots 78 of a die 79. T

The under part of the die 79 is curved to conform to the curve of thework and engages the inner side of the lower run of the belt to curvethe latter into the form of the work. It will be understood that thedies may be can be controlled with exactitude.

varied as necessary and that by means of them it is possible toabrasively finish woodwork and the like having surfaces of substantiallyany curvature. As the rods 76 are slidably arranged with respect to thebeam 71 they may be controlled manually and may be used to force thebelt against the work more or less firmly. The dies 79 have at one endtransverse tongue extensions 80 adapted to engage with grooves 81 of dieplates 82 having the lower edges 83 of any desired curvature. By meansof the die plates 82, the die 79 may be employed for providing the beltwith a different curvature without necessitating the changing of the die79 itself.

The body of the member 64 adjacent to the block 61 has a cheek 84provided with a setscrew 85 the end of which abuts against an extension86 of the block 61, to hold the same more firmly in position against thetension of the belt transmitted through the movable bearing bracket 16and the screw 62.

Further die-carrying arms 87 are slidably mounted by means of sockets 88upon the longitudinal frame member 56. The sockets 88 have recesses 89at the lower edges thereof, seating upon the upper edge of the member 56and extending downwardly beyond the slot 57. The sockets have screw-pins9O arranged in suitable openings and extending through the recesses 89into the slot 57 to prevent the displacement of the arms 87. The sockets88 further have a set-screw 91 by means of which they may be clamped inposition upon the member 56. The arms 87 have grooves 92 at the undersides near the extremities in which are slidably arranged suitabletongues of die plates 93, the lower edges of which are of any desiredcurvature and which can be replaced to change the curvature as required.It will be understood that by providing a plurality of dies, the actionof the abrasive belt upon the work The dies 79 permit the regulation ofthe pressure with WlllCll the belt is forced against the work and thedie plates 93 arranged slidably, longitudinally of the work. The dies 79permit the thorough application of the abrasive belt to the work betweenthe latter dies. I thus provide dies adjustable longitudinally of thework and dies adjustable substantially perpendicular of the work.

It will be understood that the dies and dieplates may have the partsengaging the belts suitably fashioned for the purpose, or, if necessary,faced with material of different character from that comprising the diesand plates; for instance, the die-plates 93 may have the curved edgesjoined by a band 94 of woven material to assist in forcing the flexiblebelt against the work. The pulleys may be of any common or preferredform suitable for the purpose,

Having thus described my invention I claim as new, and desire to secureby Letters Patent 1. In an abradingmachine, a frame, a movable, flexiblebelt having an abrasive surface and carried by said frame, an armadjustably secured to said frame, a die removably mounted upon said armand engaging said belt, said arm being free to move longitudinally ofsaid belt, said die extending between the runs of said belt, a seconddie adjustable transversely of said belt, and workcarryingmeans havingthree independent movements.

2. In an abrading machine, a frame, a movable, flexible belt having'anabrasive surface and carried by said frame, an arm adjustably secured tosaid frame and movable longitudinally thereof, a die on said arm, asecond arm carried by said frame and rigid therewith, a second diecarried by said second arm and movable in a direction at an angle to themovement of said first die, and workcarrying means having threeindependent movements.

3. In an abrading machine, a frame, a movable, flexible belt having anabrasive surface and carried by said frame, said frame presenting aslot, an arm having a projection slidably arranged in said slot andmovable longitudinally of said belt, a removable die on said arm, asecond arm rigidly mounted upon said frame and presenting a memberbetween the runs of said belt, a second die carried by said member andmovable transversely thereof, and workcarrying means movable toward saidbelt, longitudinally of said belt and transversely of the same.

4. In. an abrading machine, a-frame carrying a movable, flexibleabrasive belt, a longitudinal member presenting an elongated opening andarranged substantially parallel to said belt, a movable member having asocket mounted to slide upon said member and a projection engaging saidslot, a die removably secured to said arm and engaging said belt, andwork-carrying means having three independent movements.

5. In an abrading machine, a frame, a movable, flexible belt having anabrasive surface carried by said frame, an arm adjustably secured tosaid frame, a die removably mounted upon said arm andengaging said belt,said arm being free to move longitudinally of said belt, said die beinglocated between the runs of said belt, and a second die adapted toengage said belt and adjustable transversely thereof.

6. In an abrading machine, a movable, flexible belt having an abrasivesurface, a die movable longitudinally of said belt, and a ieclond diemovable at an angle with said 7. In an abrading machine, a frame, a

movable, flexible belt having an abrasive surface carried by said frame,an arm adjustably secured to said frame and movable longitudinallythereof, a die on said arm, a second arm carried by said frame and rigidtherewith, and a second die carried by said second arm and movable inthe direction substantially at right angles to the movement of saidfirst die, said dies being adapted to engage said belt.

8. In an abrading machine, a frame, a movable, flexible belt having anabrasive surface carried by said frame, said frame presenting a slot, anarm having a projection slidably arranged in said slot and movablelongitudinally of said belt, a removable die on said arm, a second armrigidly mounted upon said frame and presenting a beam between the runsof said belt, and a second die carried by said beam and movabletransversely thereof, said dies being adapted to engage said belt.

9. In an abrading machine, a frame hav in a longitudinal memberpresenting a slot, pu leys on said frame at the ends respectively ofsaid longitudinal member, a movable, flexible belt having an abrasivesurface and carried by said pulleys, an arm having a socket slidablyarranged upon said longitudinal member and a projection engaging saidslot, means for clamping said socket upon said member, said arm having adie engaging a run of said belt, further arms rigidly carried by saidframe and having a beam between the runs of said belt, said beam havingan opening, a rod slidable in said opening and having a die, said rodbeing movable in a direction transversely of said longitudinal member ofsaid frame, said dies being adapted to engage said belt.

10. In an abrading machine having a frame carrying a movable, flexible,abrasive belt, a longitudinal member presenting a slot and substantiallyparallel to said belt, a movable member having a socket arranged toslide upon said member and a projection engaging said slot, and a dieremovably se- I cured to said arm and engaging said belt.

11. In an abrading machine having a frame carrying a movable, flexiblebelt, a longitudinal member presenting a slot substantially parallel tosaid belt, a movable arm engaging said slot, and a die secured to saidarm and engaging said belt, and a second die adapted to engage said beltand adjustable transversely thereof.

12. In an abrading machine having a frame carrying a movable, flexibleabrasive belt, a longitudinal member presenting a slot substantiallyparallel to said belt, a movable arm having a socket presenting a recessarranged to slide upon said longitudinal member and a projectionengaging said slot, a die removably secured to said arm and engagingsaid belt, fixed arms having a connecting beam, and a die carried bysaid connecting beam and movable substantially at right an gles to themovement of said movable arm. 13. In an abrading machine having a framecarrying a movable, flexible abrasive belt, a longitudinal member havingan arm, a die presenting a tongue and adjustably carried by said arm,and adie-plate having a groove adapted to be removably mounted upon saidtongue of said die.

14. In an abrading machine having a frame carrying a movable, flexibleabrasive belt, a longitudinal member having an arm, a die presenting atongue and adjustably carried upon said arm, a die plate having a grooveand adapted to be removably mounted on said tongue of said die, anotherarm movable longitudinally of said belt and having a groove, and a diehaving a tongue removably arranged in said groove of said movable arm.

15.In an abrading machine, a frame, a fixed revoluble pulley, a movable,revoluble pulley, a flexible abrasive belt carried by said pulleys,means for operating said fixed pulley, means for adjusting said movablepulley, a longitudinal frame member having a slot, an arm arranged toslide at said slot and having a die engaging said belt, a fixed arm, anda second die carried by said fixed arm and arranged to move in adirection at substantially right angles to the movement of said firstdie.

16. In an abrading machine, a frame, a fixed revoluble pulley, a movablerevoluble pulley, an abrasive belt carried by said pulleys, means foroperating said movable pulley to regulate said belt, work-carrying meanshaving three independent movements, an arm adjustably secured to saidframe, and a die removably mounted upon said arm and engaging said belt.

17. In an abrading machine, a movable flexible belt having an abrasivesurface, a die movable longitudinally of said belt, a second die movableat an angle with said belt, and work-carrying means permitting themovement of the work towards said belt, longitudinally of said belt andtransversely of the same.

18. In an abrading machine, a frame, a'

fixed revoluble pulley, a movable revoluble pulley, an abrasive beltcarried by said pulleys, means for adjusting said movable pulley toregulate said belt, an arm adjustably carried by said frame and movablelongitudinally of said belt, a die on said arm, a second arm carried bysaid frame, a second die carried by said second arm and movable in adirection at an angle to a run of said belt, said dies being adapted toengage said belt, a movable workcarrier, means for adjusting saidcarrier in three directions, and means for operating said carrier toadjust the same.

19. In an abrading machine, a frame, a fixed revoluble pulley, a movablerevoluble pulley, an abrasive belt carried by said pulleys, means for 0erating said movable ulley to regulate said belt, an arm adjustabl ycarried by'said frame and movable longitudinally of said belt, a die onsaid arm, a second arm carried by said frame, a second die carried bysaid second arm and movable in a direction substantially perpendicularto a run of said belt, said die being adapted to engage said belt, amovable work-carrier, means for guidin said carrier towards said belt,longitudina ly of said belt and transversely of the same, and means foroperating said work-:

carrier.

20. In an abrading machine, a movable,

fleXible belt having an abrasive surface, 15 means for adjusting thetension of said belt, and a plurality of independently movable dies, thedirection of movement of each of said dies being at an angle with thedirection of movement of another of said dies.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALPHA VIVIAN WALKER.

Witnesses:

MONROE J. RICH, FRED E. SHORT.

